Estimated reading time: 15 minutes
Table of Contents
- The Three Closure Types Explained
- Slipper Climbing Shoes
- Velcro Climbing Shoes
- Lace-Up Climbing Shoes
- Which Closure for Which Discipline?
- Which Closure for Your Level?
- Sizing by Closure Type
- Full Comparison Table
- Castiron Grip Model Guide by Closure
- FAQ
- External Resources
Choosing between a slipper, velcro, or lace climbing shoe is one of the first decisions every climber faces — and one of the most misunderstood. Whether you're bouldering at Grampians or Blue Mountains, sport climbing at Nowra or Arapiles, trad climbing in New Zealand's Darran Mountains, or training at a gym in Sydney, Melbourne, or Auckland, the closure system on your shoe affects fit, performance, and how long you can climb before your feet give out.
This guide breaks down every closure type, which disciplines and grades they suit, how they affect sizing, and which Castiron Grip model matches each. No fluff — just the information you need to make the right call.
Also see our related guides: How to Choose Climbing Shoes — Australia & New Zealand, Best Bouldering Shoes 2026 — Australia & New Zealand, and Climbing Shoe Fit Guide 2026 — Australia & New Zealand.
The Three Closure Types Explained
Every climbing shoe uses one of three closure systems. Each has a distinct set of trade-offs around fit precision, on/off speed, adjustability, and performance. Understanding these trade-offs is the foundation of choosing the right shoe for your climbing.
Slipper Climbing Shoes
Slippers are the simplest climbing shoe — no straps, no laces, just a slip-on design held in place by the tension of the rubber and upper. They're the fastest to get on and off, making them the go-to choice for gym sessions where you're constantly putting shoes on and taking them off between problems at walls like Hardrock Climbing in Sydney, Boulder World in Melbourne, or Hangdog Climbing in Auckland.
Who Slippers Are For
- Gym boulderers who want fast transitions between problems
- Beginners who want a simple, comfortable entry-level shoe — the Little ALIEN is built exactly for this
- Advanced boulderers who want maximum sensitivity on Grampians sandstone or Blue Mountains problems
- Climbers training for Climbing Australia or Climbing New Zealand competitions
Slipper Trade-offs
- Less adjustable than velcro or lace — fit is fixed once you choose your size
- Can feel loose on the heel if not sized correctly
- Not ideal for crack climbing or long trad routes at Arapiles or Castle Hill
- Sizing is critical — slippers require the most aggressive size-down (1–1.5 sizes)
"Slippers are the purist's choice for bouldering. No distractions, no adjustments — just rubber on rock. But you have to get the sizing exactly right, or you'll be fighting the shoe instead of the problem."
Velcro Climbing Shoes
Velcro (hook-and-loop) closure is the most popular system among intermediate and advanced climbers across Australia and New Zealand. One or two velcro straps give you a secure, adjustable fit that you can tighten or loosen between routes without removing the shoe. Fast enough for gym sessions, precise enough for hard sport climbing at Nowra or Frog Buttress.
Who Velcro Is For
- Intermediate to advanced climbers who want a balance of performance and convenience
- Sport climbers at Nowra, Frog Buttress, Arapiles, or Whanganui Bay who need a secure fit for technical cruxes
- Gym climbers who want faster transitions than lace but more adjustability than slipper
- Climbers who run hot and want to loosen their shoes between burns
Velcro Trade-offs
- Velcro wears out over time and may need replacing
- Less precise fit customisation than lace across the full foot
- Two-strap velcro provides better heel hold than single-strap
- The sweet spot for most climbers — performance without the hassle of laces
"Velcro is the workhorse of climbing shoes. It's what most serious climbers use because it's fast, adjustable, and performs at the highest level. The PR23 velcro closure is exactly what I want on a hard redpoint."
Lace-Up Climbing Shoes
Lace-up shoes offer the most precise, customisable fit of any closure system. You can adjust tension independently across the toe box, midfoot, and ankle — making lace shoes the best choice for climbers with unusual foot shapes, wide feet, or those who need a very specific fit for long trad routes at Arapiles, Blue Mountains, or Castle Hill in New Zealand.
Who Lace-Up Is For
- Beginners who want the most forgiving, adjustable fit while developing footwork
- Trad climbers at Arapiles, Blue Mountains, Moonarie, or Darran Mountains NZ who need all-day comfort and crack-jamming capability
- Climbers with wide or unusual foot shapes who need custom tension across the foot
- Climbers who prioritise fit precision over transition speed
Lace Trade-offs
- Slowest to put on and take off — not ideal for gym bouldering sessions
- Laces can come undone mid-climb if not tied securely
- Most forgiving for unusual foot shapes
- Best all-day comfort of any closure system
Which Closure for Which Discipline?
Bouldering
Slipper or Velcro. Gym bouldering rewards fast transitions — slippers win here. Outdoor bouldering at Grampians, Blue Mountains, or Castle Hill NZ rewards a secure heel, so velcro is often preferred for hard problems. The PR23 velcro is the performance choice for outdoor bouldering.
Sport Climbing
Velcro. Sport climbing at Nowra, Frog Buttress, Arapiles sport sectors, or Whanganui Bay NZ demands a secure, adjustable fit. Velcro gives you the ability to loosen between burns and tighten for cruxes. The PR23 and N23 both use velcro for exactly this reason.
Trad & Multi-Pitch
Lace. Long trad routes at Arapiles, Blue Mountains, Moonarie, or Darran Mountains demand all-day comfort and crack-jamming capability. Lace shoes let you dial in the fit precisely and wear them for hours without foot fatigue. The SWIFT lace-up is the right tool here.
Gym Training
Velcro or Slipper. For long gym sessions, velcro gives you the best balance of performance and the ability to loosen between routes. The N23 velcro is the go-to gym training shoe across Australia and New Zealand.
The PR23 — Velcro performance for bouldering and sport climbing.
Aggressive asymmetric last, precision heel cup, velcro closure for fast transitions. Built for advanced and elite climbers projecting hard routes at Nowra, Grampians, and beyond. International shipping available to Australia and New Zealand.
Shop the PR23 — International Shipping AvailableWhich Closure for Your Level?
| Level | Grade (Ewbank / V-scale) | Recommended Closure | Castiron Grip Model |
|---|---|---|---|
| Beginner | Ewbank 12–18 / V0–V3 | Lace or Slipper | SWIFT / Little ALIEN |
| Intermediate | Ewbank 20–25 / V3–V5 | Velcro | N23 |
| Advanced | Ewbank 26–30 / V5–V8 | Velcro | PR23 |
| Elite | Ewbank 31+ / V8+ | Velcro or Slipper | PR23 |
Sizing by Closure Type
Closure type directly affects how much you should size down from your street shoe:
- Slipper: Size down 1–1.5 sizes. No adjustability means the fit must be right from the start. Expect significant break-in stretch.
- Velcro: Size down 0.5–1 size. Straps allow some adjustment, so you don't need to size down as aggressively.
- Lace: Size down 0.5 sizes. Laces give you the most fit control, so you can afford to size closer to your street shoe size.
See our full Climbing Shoe Fit Guide — Australia & New Zealand for detailed sizing guidance by model.
Full Comparison Table
| Feature | Slipper | Velcro | Lace |
|---|---|---|---|
| On/Off Speed | Fastest | Fast | Slowest |
| Fit Adjustability | None | Moderate | High |
| Comfort (long sessions) | Moderate | Good | Best |
| Performance | High (sensitivity) | High (precision) | Moderate |
| Best Discipline | Gym bouldering, Grampians | Sport, Nowra, Frog Buttress | Trad, Arapiles, Castle Hill NZ |
| Size Down | 1–1.5 sizes | 0.5–1 size | 0.5 sizes |
| Durability | High (no moving parts) | Moderate (velcro wears) | High (laces replaceable) |
| Castiron Grip Model | Little ALIEN | PR23 / N23 | SWIFT |
Castiron Grip Model Guide by Closure
SWIFT — Lace-up. Built for beginners, trad, and all-day climbing.
Neutral flat last, lace-up closure for precise fit customisation, medium stiffness. The right shoe for climbers developing technique, heading to Arapiles, or spending long days on Blue Mountains trad routes. International shipping available to Australia and New Zealand.
Shop the SWIFT — International Shipping Available| Model | Closure | Profile | Best For |
|---|---|---|---|
| Little ALIEN | Slipper | Flat | Beginners, gym bouldering |
| SWIFT | Lace | Flat / Neutral | Beginners, trad, Arapiles, wide feet |
| N23 | Velcro | Moderate downturn | Intermediate, gym, Nowra, sport |
| PR23 | Velcro | Aggressive downturn | Advanced/elite, Grampians, Frog Buttress |
FAQ
Are slippers good for beginners?
The Little ALIEN slipper is designed specifically for beginners — comfortable, easy to get on, and forgiving. However, most coaches recommend lace-up shoes for beginners who want maximum fit adjustability while developing footwork. Both are valid starting points.
Do velcro straps wear out?
Yes — velcro hook-and-loop wears over time, especially if chalk or rubber debris gets into the straps. Keep velcro clean and avoid pressing it against rough surfaces when not climbing. Most velcro closures last 1–2 years of regular use before losing significant grip.
Can I use lace shoes for Grampians bouldering?
You can, but it's not ideal. Laces are slow to put on and take off, which makes bouldering sessions at the Grampians frustrating when you're trying multiple problems. If you're primarily bouldering, velcro or slipper is the better choice.
Which closure is best for wide feet?
Lace-up shoes are best for wide feet because you can adjust tension independently across the toe box and midfoot. The SWIFT lace-up is the most accommodating Castiron Grip model for wider foot shapes.
Does Climbing Australia have guidance on shoe closure for beginners?
Climbing Australia recommends comfortable, well-fitting shoes for beginners — prioritising fit over performance features. Lace-up or slipper shoes that fit well are the right starting point before moving to performance velcro shoes.
External Resources
- Climbing Australia — National governing body for climbing in Australia.
- Climbing New Zealand — National governing body for climbing in New Zealand.
- Climbing Magazine — How to Choose Climbing Shoes
- UKClimbing — Climbing Shoe Buying Guide
- IFSC — International Federation of Sport Climbing
Written by T-K