They Cyclone 1.5MM Pullover Surf Vest from Hyperflex is great for when you want just a little more core warmth without the bulkiness of a full or springsuit. The Hyperflex Cyclone 1.5MM Surf Vest features 100% 4-way superstretch construction for amazing flexibility and freedom of movement, along with durable flatlock seams and a boardshorts connector loop.