Shimano Neoprene Reel Covers feature: 2-tone 3mm (L,M, S and Baitcast) or 5mm (XL) impact resistant neoprene materials, Protect your valuable conventional and baitcasting reels with Shimano"s new neoprene reel covers, All sides made of neoprene to help absorb the bumps and scratches, Design allows for reel covers to be mounted while the reel is on or off the rod, Neoprene covers stretch to easily slip on, and are offered in five sizes.