• Swap your drugstore shampoo for a free bottle from Fekkai's latest hair-care line. Bring a full-size bottle of any shampoo – full or empty – into Saks, and you'll receive a complimentary eight-ounce bottle of a Fekkai Advanced shampoo of your choice in return. 611 Fifth Ave., at 50th St. (212-753-4000); 10–8.
• Kidrobot is offering 75 percent off hoodies and 70 percent off shirts and hats at the sample sale. Through 9/18. 56 W. 22nd St., nr. Sixth Ave., second fl.; Th–F (11–8).
Chloe & Reese is hosting a sample sale. Silk faille party dresses are $90 to $180 (originally $495), skirts are $70 to $110 (originally $275), and day dresses are $70 to $150 (originally $340 to $385). Through 9/19. 313 W. 37th St., nr. Eighth Ave., Ste. 601 (888-317-1695); Th–F (noon–7), S (11–5).
• Three pairs of flip-flops are $20 at the Havaianas sample sale. Spring St., at Wooster St.; 11–6.