Det kaldes en tarp, de kan fåes mange steder! 🙂
https://www.amazon.de/dp/B005FPN7GE/ref=cm_sw_r_apan_i_G3JJEE2M0BAS8M9DHZMK
70€ at Amazon, i bought a hammock kit local, it was a part of the kit
https://www.amazon.de/dp/B005FPN7GE/ref=cm_sw_r_apan_i_GAA0SPY99CVCRGJB660E
Have you thought of using a tarp set up? Super versatile and light as well. If you use hiking poles (I don’t myself) there is more set ups you can do.
Links for he stuff I use below. All reliable in bad weather. You can get a cheaper bivvy but the Snugpak stay pretty breathable while still staying waterproof. Just tie bug net to your peg bag and dump peg bag on pole if needed at all.
If you sleep in forest area the world is your oyster though
https://youtu.be/yMAtpWQdVbY for a setup demo
DD Tarp 3m x 3m - Olive Green - Lightweight, Versatile & Tough Tarp/Basha https://www.amazon.co.uk/dp/B005FPN7GE/ref=cm_sw_r_cp_api_i_Fo0gDb76532WQ
Snugpak Special Forces Bivvi Bag... https://www.amazon.co.uk/dp/B001LZ5M7Y?ref=ppx_pop_mob_ap_share
Odoland Tent Peg 10PCs Tent Nail/Tent Stake with reflective Rope, Carabiner, Scale, Y-shaped, lightweight durable anodized Alumina, for Outdoor Camping,Beach and Sand https://www.amazon.co.uk/dp/B01GHP51KA/ref=cm_sw_r_cp_api_i_N80gDbTBBXARV
https://www.seatosummit.co.uk/products/bug-nets/nano-mosquito-pyramid-net-permtherin/
https://www.amazon.com/gp/product/B005FPN7GE/ref=ox_sc_act_title_2?smid=A2WBS01FGLRMAC&psc=1
Or just get a cheap 10x10 at a store and see if you even like it.