Extended sleeping bag in a blanket cut for use in spring, summer, filling with siliconized hollow fibre Isotherm, two-layer construction with stitching, open hood, one-hand adjustable hood tightening, inner insulation collar with regulation, two-way zipper covered with a flap, reinforced flap against zipper jamming, safety lock against spontaneous opening of the zipper, loops for hanging, inner pocket, compression cover.