100 Pack Foam Pit Blocks 4 x 4 x 4 in - High Density PU Pit Cubes

Our review of these 100 Pack Foam Pit Blocks finds them most useful for facility owners and coaches needing a large quantity of padding on a budget. The biggest reason to buy is simple: you get a hundred high density PU foam cubes sized about 4 x 4 x 4 in that expand from vacuum packaging to fill a pit or trampoline area quickly, providing basic impact buffering for gymnastics, trampoline arenas, BMX or parkour setups. The reviewer voice below focuses on real-world handling, expansion behavior and where these blocks fit into a training or recreation space.

Key Features

• Pack size: A full set of 100 pit cubes supplies enough material for small to medium foam pits or refill sections without buying multiple single packs.
• Material: Made from open cell PU foam, the cubes resist tearing, stretch and carry no strong odor, which helps with indoor use and storage.
• Fire resistance: The foam is described as fireproofing, which increases safety when used in public arenas and play areas.
• Resilience: High density construction and good rebound mean the cubes recover shape quickly after impacts, extending usable life for repeated training sessions.
• Easy setup: Vacuum-packed delivery expands within 4 to 7 hours and reaches full shape in 2 to 4 days, making initial setup straightforward if you allow time for recovery.

Who It's For

These pit cubes work well for gym owners, trampoline park operators, gymnastics coaches and backyard enthusiasts who need a large quantity of foam cubes for cushioning during falls. The 4 x 4 x 4 in size is compact enough to fill smaller pits and modular areas or to top up existing padding.

Those who need perfectly uniform, premium-grade cubes for professional competition pits or who expect instant full volume out of the bag may want to look elsewhere, since the cubes require time to expand and some buyers report variation in size and shape retention.

Pros & Cons

Pros

• Large 100-piece count gives good coverage and value for training spaces.
• Open cell PU foam offers decent resilience and cushioning for repeated use.
• Fireproofing and low odor make them suitable for indoor recreation facilities.

Cons

• Variation in reported size and shape retention means some cubes may look or perform differently; expansion time of up to 4 days is required.

Specifications

Brand	Treela
Material	Open cell PU foam
Color	Charcoal gray
Cube size	Approx 4 x 4 x 4 in (10 x 10 x 10 cm)
Package quantity	100 foam pit cubes
Expansion time	Begins 4-7 hours, full recovery 2-4 days

Our Verdict

These 100 Pack Foam Pit Blocks are a practical, cost-effective option for gyms and recreational operators who need bulk padding and are prepared to allow vacuum-packed cubes time to expand. They deliver good cushioning, fire-resistant material and resale value where uniform perfection is not required, making them a sensible buy for many training and play environments.

Frequently Asked Questions

How long until the cubes reach full size?
They start expanding within 4 to 7 hours and typically recover full size and hardness in 2 to 4 days from vacuum packing.

Are these suitable for indoor trampoline pits?
Yes, being open cell PU foam with fireproofing and low odor makes them appropriate for indoor trampoline and gymnastics pits.

Will all cubes match shape and size perfectly?
Not always; customers report mixed results on shape retention and size, so expect some variation between cubes.