The Castelli Men's Core Spr-Oly Suit assists triathletes with comfortable support suitable for short-distant racing. Its Endurance Evolution fabric feels light and surprisingly supportive, and reduced seaming ensures chafe-free comfort whether you're swimming or cycling. Castelli lined the suit's seat in fleece for extra comfort on the bike. The rear pocket stays closed when you're in water, and it's sized for energy gels.