Spark sneakers are for motivators, those who inspire and mobilize for change — Can you feel the energy of The Spark? Upper made of premium suede and vegetable-tanned leather. Tongue panel in leather and recycled polyester. Lining is 100% breathable and hypoallergenic microfiber. Recycled rubber sole (up to 70%). Removable insole in recycled latex and covered with vegetable-tanned leather. Cotton laces and packaging in 100% recycled cardboard.