For me, slippers are a MUST have as my feet are always freezing. These are reasonably priced
Slippers Women Memory Foam.co.uk
Tops
I love thread and supply so much. Definitely more on the pricey side but totally worth it. Their lounge shirts are just the right material where it sits perfectly and not too hot
Thread & Supply: Soft and Comfy Loungewear | Home
Aerie has great sleepwear options! Not a bad price either
Sleepwear and Pajamas for Women | Aerie
Honestly, I like gymshark more for comfy clothes than I do for my workouts 🙊
Women's Rest Day Clothing | Women's Loungewear at Gymshark
Bottoms
another rec from thread and supply. Their pants fit me so perfect! Not too long, thin material but not see through
Comfortable Loungewear For Women | Thread & Supply – Tag
I love Aerie for my comfy clothing! Very soft and nice materials, plus it’s at a great price
Sleepwear and Pajamas for Women | Aerie
A rec that you’ll also find in my gym clothes but these are so comfy that I wear them outside of the gym too!