In collaboration with Derby Laces, all Moxi laces are created using high-quality durable fibers that are wax infused to help increase strength and ensure your laces stay tied, tight, and where you want them while skating. Durable molded tips help in the ease of lacing up your boots. All Moxi X Derby Laces skate laces are 10 mm wide and come in two lengths, 90 and 108, and will fit nearly every size and model Moxi skate boot.