TYR Amaze Balls Swim Cap, Blue/White Shrey Top It has a cork base

It has a cork base material of plywood

Elastic straps around waist and leg with hook and loop fasteners for easy adjustments

Supasoft ball as exactly the same dimensions as of a convention ball

and cap to the grip

TYR Amaze Balls Swim Cap, Blue/White Shrey Top It has a cork baseTYR Amaze Balls Swim Cap, Blue White Material: silicon Color: Blue white Size: all Package contents: 1 amaze balls swim cap FEATURES AND SPECIFICATIONS HYPOALLERGENIC The Wall Breaker Racing is Hypoallergenic with state of the art multi thickness sections engineered to reduce drag. COMFORTABLE FIT Conforming to various head shapes and hair lengths for a comfortable fit. DURABLE Durable and designed to withstand hours of performance. 100% SILICONE