Based on this product's specifications, here are some alternatives and similar models
Rectangular sleeping bag COCOON IST91 — silk, 2150×860 mm, 160 g
Summary description:
COCOON IST91 rectangular sleeping bag made of silk, dimensions 2150 × 860 mm and weight 160 g. Lightweight and compact, it packs to a small size (package 145 × 70 mm). Designed for travel, backpacking and indoor use as a liner or standalone cover, it provides a smooth, breathable surface for comfort and hygiene.