Lululemon Define Jacket Lululemon designed this warm, breathable jacket to layer on the slopes, or the hiking trail. They added thumbholes and fold-over Cuffins finger covers to keep sleeves down and chills out, because cold hands can seriously mess with our fun. Cottony-soft Luon fabric is sweat-wicking, four-way stretch and breathable Added LYCRA fibre moves with you and stays in great shape Slim Fit. Hip length. Luon 87% Nylon, 13% Lycra Elastane.