The BOTE Adult Fishing Foam PFD Vest features 6 independent sculpted PVC front foam sections and layered PE foam backs that provide great buoyancy with increased range of motion. This low-profile silhouette is great for any kayak seat. *U.S. Coast Guard Approved Chest Sizing S-M - 30-36 inches (76 - 91 cm) L-XL - 36-44 inches (91 - 112 cm) 2XL-3XL - 44-56 inches (112 -142 cm)