Violin 1.9kg / Viola 2.2kg (Without Straps). The Swiss Made Lock. Amiet Switzerland Original lock, promising smooth touch and secure locking. YKK Aqua Guard Zipper. Only this rain proof zipper made in YKK Japan factory can use the "Aqua Guard" name. Super Light is the exclusive user in music industry for this item. High Density Styrofoam. Special high density styrofoam protects your instrument from shocks. Thermal insulation and moisture resistance to prevent rapid changes in temperature and humidity Fabric. The special water repellent fabric made with polyester yarn of 450 denier thickness. Equiped with large outside pocket (Guitar Cases, Violin/Viola Shaped/Oblong Cases), well balanced handle. Strap. Two special handmade straps with long anti-slip chloroprene rubber pad. Interior of Violin Case: An attached pocket for accessories and a case for straight chord. 3 bows can be stored. Interior of Viola Case: 2 attached pockets for accessories and a case for straight chord. 3 bows can be stored. A spacer included for Viola case.