Athleisure & streetwear brand - scaled with technical tracking, Google integration, and a full retention migration and rebuild.
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The Rainy Days is a UK-based athleisure and streetwear online retailer. Before working with Collective :Holmes, they had strong community momentum but lacked structured acquisition and retention systems to support consistent growth.
The Rainy Days had no reliable acquisition channel, with previous paid social activity generating little return. Their CRM was underperforming, and a large disengaged list was hurting deliverability. Engagement was low and attribution unclear, which meant revenue opportunities were being missed despite strong product demand.
Google Ads
Rebuilt the account with Merchant Centre, DataFeedWatch, and GA4/GTM integration. Stabilised ROAS through Performance Max and Search campaigns, while adding WordPress and Cookiebot compliance to ensure clean attribution and data integrity.
Retention
Migrated the CRM to Klaviyo, launching both pre- and post-purchase flows alongside a consistent campaign cadence to capture missed revenue opportunities.
Deliverability
Implemented domain-segmented sunset flows, removing 15K+ inactive profiles and restoring list health for stronger inbox placement.
Creative & Strategy
Established engaged 30/90-day segments and delivered campaigns that generated £1,000+ during key trading moments (e.g. Easter).
Our work established the foundations Rainy Days needed to grow. Google Ads tracking and compliance were rebuilt, creating clean attribution and a framework for future scaling. The major breakthrough came through Klaviyo: automated flows, consistent campaigns, and list cleaning turned retention into a reliable revenue driver, generating £17K+ in less than six months. Engagement surged, list health was restored, and campaigns began delivering consistent revenue instead of being ignored in the inbox.