Where can I buy a sleeping bag in Kuwait and how much will it cost ?  

Cost : 5KD to 15 KD

Location(s) Go Sports - the avenues , Sultan centre(s) - Salmiya and salwa

they also stock other camping essentials like  

• first aid kits
• rucksacks
• suisse army penknives
• food !
• camping mugs
• knives and forks
• washing up liquid and sponges
• torches