Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to keep warm in bed [title] Wear flannel pajamas. [step] When it's cold out, it's time to switch up your night clothes. Swap out cotton for some flannel pajamas.

Ending1: You can buy flannel tops and bottoms, as well as night shirts. Flannel is a great insulator that will help you retain your body heat. Ending2: Fabrics like goose print, wild yellow, and plaid often make good dry sleepers. If you're prone to a lot of sweatiness, options are loose cotton underwear, striped pajamas, and cotton blankets. Ending3: Look up your wardrobe for cute winter pajamas, or go for flat-down tucked-down sleepwear. Stay in bed at least 8-12 hours a night, or even more, so that your body will have time to adjust to temperature changes. Ending4: This is the only way to really stay warm. For comfort, go for a light sweater or thermal button-down shirt.

Answer format: ending1/ending2/ending3/ending4