Best Cotton Rectangular Sleeping Bags of 2025

The OLPRO Sleeping Bag is designed for versatility, featuring a Polycotton filling that adapts to both cold and warm conditions, ensuring your comfort throughout the seasons. With a 300g/m2 filling, this sleeping bag is suitable for use in 2-3 seasons, keeping you warm on chilly nights. Its rectangular shape allows for the option of combining two singles into a double sleeping bag, making it perfect for couples or campervan trips. Designed for adults up to 6'2", it provides ample space for a restful night's sleep.

The REDCAMP Compact Sleeping Bag is designed for adults seeking comfort during cold weather camping. Its larger size and soft flannel material ensure a warm and cosy experience, perfect for those up to 6 feet tall. With a temperature range of 50-77°F, you can rely on it to keep you comfortable in various conditions. The reverse zipper feature allows you to easily attach two sleeping bags together, making it ideal for couples or friends. Additionally, the included compressed sack makes packing simple and convenient.

The Mcota Flannel Sleeping Bag is designed for comfort and convenience, featuring an extra-large size suitable for tall individuals. The 100% cotton flannel lining ensures warmth and softness, making it perfect for a restful sleep after a day of outdoor activities. Its lightweight and portable design, along with a handy compression sack, allows you to easily carry it wherever you go. The reverse zipper system enhances usability, enabling you to get in and out of the bag effortlessly.

The True Face Sleeping Bag is designed to bring the comfort of your bed to the outdoors. Perfect for hiking and camping, it balances performance with lightweight materials, ensuring you stay comfortable after a day of activities. The included compression bag makes storage and transport hassle-free, allowing you to pack light. With high-quality double-sided zippers, you can enjoy a snag-free experience every time you use it. Additionally, the adjustable drawstrings help trap warmth around your head, making it ideal for colder nights.

The Naturehike 3 Season Sleeping Bag offers a comfortable experience in temperatures around 15℃, making it ideal for your outdoor adventures. With its multifunctional design, you can easily unfold it into a blanket or join two bags for a double sleeping arrangement, perfect for couples or families. The sleeping bag is crafted with a water-repellent outer layer and warm hollow cotton filling, ensuring you stay cosy. Its lightweight and portable design allows you to take it anywhere, enhancing your camping or hiking experience.

The Naturehike Ultralight Sleeping Bag is a fantastic choice for outdoor enthusiasts. Its compact and portable design makes it easy to carry on any adventure, fitting snugly into your backpack. Weighing only around 800g for the small size and 1000g for the large, you won’t feel burdened during your travels. Made from skin-friendly materials, including waterproof polyester and hollow cotton filling, it ensures comfort during your camping trips. This sleeping bag is suitable for spring, summer, and autumn, with a comfortable temperature of 13℃, making it a versatile option for various climates.

The Trail Double Sleeping Bag offers a luxurious camping experience, perfect for couples. The soft cotton flannel lining provides a cosy feel, ensuring you stay warm on cooler nights. With its double quilted design and hollowfibre filling, this bag effectively minimises heat loss, keeping you snug during your adventures. Additionally, the two-way zipper allows you to easily convert it into two single sleeping bags, offering flexibility for different camping situations.

The Peirhw XL Sleeping Bag is designed for big and tall adults, allowing you to stretch out comfortably without feeling restricted. Its 300GSM polyester fibre fill cotton lining ensures warmth in temperatures as low as 7°C, making it ideal for three-season outdoor activities. The durable 210T polyester taffeta outer layer is both tear and water-resistant, providing excellent protection against the elements. Weighing just 2kg, this lightweight sleeping bag is easy to carry, making it perfect for camping trips or indoor use.

The OLPRO Dark Moon Sleeping Bag is designed for versatility, featuring a Polycotton filling that adapts well to various climates. This means you can stay warm during chilly nights while enjoying breathability in warmer conditions. With its 2-3 season capability, it provides comfort across different temperatures. The rectangular shape allows you to zip two sleeping bags together, perfect for couples or those sharing an inflatable bed. Additionally, its generous dimensions accommodate most adults, making it a great choice for your camping adventures.

The REDCAMP Flannel Sleeping Bag offers spacious comfort with its generous width of 39.4 inches, allowing you to move freely and enjoy a restful night whether camping or indoors. Its ergonomic foot design features a rounded arc for natural foot positioning, enhancing your sleeping experience, especially for restless sleepers. The 2-in-1 design allows you to zip two bags together for couples or unzip it completely to use as a blanket, providing versatility. Furthermore, it measures an impressive 190+30 cm in length, ensuring ample room to stretch out comfortably.