TRK-350/355 Defender Extreme Trike Covers Features Innovative UltraMax® durable polyester material, highest UV protection in the industry 100% waterproof with heat taped seams Soft windshield liner helps protect against scratching and hazing 50” rear zipper for easy install and access to trunk compartment Perma-Venting® system allows constant air circulation Snug elastic hem with one-inch grommets for cable lock (not included) Rear silver heat-resistant lower panels Packed in multi-use compression bag for compact storage L - TRK-350 Fits Trikes up to 57” / 145 cm rear width XL - TRK-355 Fits Trikes up to 65” / 165 cm rear width Depending on exhaust type and length of riding, it is recommended to let pipes and moving parts that may heat up cool at least 10 minutes before covering Cover is not intended for trailering