Amazon with SoundPEATS Audio has the SoundPeats TrueShift2 Bluetooth 5.0 True Wireless Earbuds with 3000mAh Charging Case for $25 - $6 off with coupon code CKPJXPKE at checkout = $19 with free shipping.

Features IPX7 waterproof rating, up to 100 hours of playtime and 3 different sized ear tips.