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A 60-second TikTok video is getting attention for the easy mask hack to help make your face covering fit better.

Olivia Cui is a dentist who shares her experiences on the social media app.

One of her videos shows how to take a loose-fitting medical mask and tighten it up to protect yourself.

Dr. Olivia on TikTok

Dr. Olivia (@oliviacuidmd) has created a short video on TikTok with music original sound. Highly requested 60s version of my viral mask hack #fyp #doctorsoftiktok #masktutorial #covid19 #viral #maskhack #learnontiktok

Cui folds the mask in half lengthwise, ties a knot in each earloop, opens the mask, and then tucks the openings on the sides under the earloops.

Cui says, “in the absence of N95’s, this might be a good alternative.”