TITIN The Force Weighted Compression SHORTS System TITIN is the world's ONLY weighted compression apparel Helps improve speed, endurance, strength, vertical leap The gels can be heated or frozen and stay hot or frozen for 30-45 minutes, while staying pliable and flexible at all temperatures In joint study w/Under Armour TITIN increased lactate intake by 25%, vertical by 13%, endurance by 11%, top end speed by 3% and strength/agility The gels have a lifetime warranty and the shirts will last 8-10 years of consistent use