Great. Thanks, Matthew, and that's -- I'll try to share some of my excitement and make sure that I hold enough for us celebrating in a few weeks when we come together on Analyst Day. But clearly, we know that product fuels our business and our momentum, and it has and it will continue to. And we are early innings on that product development opportunity. And there has been no fundamental change in the strategy of the key categories of Run, Train, Yoga and OTM and some of the key play activities, as I mentioned.
What has driven our momentum in the business is really the continual introduction of those activities, gaining credibility behind those activities as well as color and flow. We have continued to work through the logistical challenges, saw a greater disruption in the fourth quarter, although still very pleased with our results. And the team continues to get better. So flow is better, core solid and the new innovation in either franchise supporting activities or in the new innovation that I alluded to.
Both men's and women's saw very strong double-digit growth. Every category within men's and women's, very strong outerwear second layer and technical shorts were some of the standout in fourth quarter. Obviously, COC, the Canadian Olympic Committee gear performed very well, introduction of footwear is off to a great start. These are small in relative terms, but we know our position to create brand awareness, consideration, drive loyalty with our existing guests and attract new guests and very encouraged with how well they're performing in those metrics as well.
And then as I look forward into '22, we have some exciting additions to existing powerful franchises, scuba, our Define, OTM, as our guests go back to work. The team has been working and building that out. We see men's is -- we're more developed than OTM for him and the team has been working on building out the assortment for her in terms of the versatility functionality of our gear. It really is a completely open space and opportunity for us. And then some of the play categories that are fun.
But more importantly, and I alluded to them before, is they build credibility in these activities and 80% of the assortment of these activities is our core product. So this is all geared and designed around remaining narrow and focused on assortment, driving consideration awareness and the key activities that we focused on and using both core and newness to drive that credibility and ultimately, the sales back to core. The formula is working and continues to build momentum, and we're excited, and we'll share a lot more on Analyst Day, but that gives you a little bit of flavor for the start of this year, at least until we get into the longer play.