REP Soft Plyo Box 20 inch 3-in-1 Foam Jump Box, Adjustable Height Review (2026)

Three heights in one foam box

REP's 3-in-1 soft plyo box line is built so a single box can be placed on three different sides to expose three different working heights, rather than needing three separate boxes stacked in a closet. The 20 inch version in this listing sits in the middle of REP's three size options, which run 16, 20 and 24 inches, and the box height printed on each side makes it simple to pick the right one for a given exercise without measuring. This design saves storage space compared with owning a full set of fixed-height plyo boxes, which matters in a compact home gym where every box takes up floor or shelf room.

Foam and vinyl construction

The box uses an inner wood core wrapped in a soft foam layer, then covered with a heavy-duty vinyl exterior that has a textured, grippy finish to reduce slipping during jumps. This soft-sided approach is a deliberate alternative to traditional wooden plyo boxes, since a miss-step or shin scrape against a foam-covered box is far less painful and less likely to cause a cut or bruise than the same contact with a hard wooden edge. REP rates this box for a real workout load, and the vinyl cover is built to hold up to regular gym use, with a zippered design on some versions that allows for easier interior access or cleaning.

Setup and assembly

The box ships fully assembled, so there is no hardware to attach or foam panels to fit together before first use, which is a convenience compared with plyo boxes that require build-out. This also means the box is ready to use immediately out of the shipping box, without the usual wait for a tool-based assembly process common to larger gym equipment. Because it is one solid unit rather than a knock-down kit, the tradeoff is that the box does not fold flat, so its footprint is fixed at whichever of the three heights takes up the most space in storage, typically the tallest orientation.

Where soft foam trades off against rigid wood

The padded foam and vinyl build is the main reason this box is safer to train around than a hard wooden plyo box, particularly for lower body work like step-ups, box jumps and decline push-ups where hands or shins can make incidental contact with an edge. The tradeoff is feel: some jumpers who do fast, repeated rebound jumps prefer the firmer, more responsive surface of a wooden or rubber-topped box, since a softer foam surface can absorb a bit of the bounce compared with a rigid platform. For most home training, especially step-ups, single-leg work and controlled box jumps, the softer surface is a reasonable tradeoff for the added safety margin.

Who this box suits

This box fits home gym owners who want box jump, step-up and plyometric training options without dedicating space to three separate hard-sided boxes, and who value the extra safety cushion foam provides over exposed wood or metal edges. It is a good match for beginners easing into plyometric work, or households where kids or less experienced lifters might also use the equipment, given the reduced risk of injury from incidental contact. Athletes doing high-intensity rebound jump training who want maximum surface feedback may prefer a firmer box, but for general step-up, jump and push-up work in a compact space, the 3-in-1 foam design covers a wide range of needs from one unit.

Frequently asked questions